package com.lyd.blog.web.admin;


import com.lyd.blog.po.Type;
import com.lyd.blog.service.TypeService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;
import javax.xml.ws.RespectBinding;

@Controller
@RequestMapping("/admin")
public class TypeController {

    @Autowired
    private TypeService typeService;

    @GetMapping("/types")    //PageableDefault 设置分页默认的值.大小，排序方式
    private String types(@PageableDefault(size = 5,sort = {"id"},direction = Sort.Direction.DESC)
                                     Pageable pageable, Model model){

        model.addAttribute("page",typeService.listType(pageable));
        return "admin/types";
    }

    //返回新增页面
    @GetMapping("/types/input")
    public String input(Model model){
        model.addAttribute("type",new Type());
        return "admin/types-input";
    }

    @GetMapping("/types/{id}/input")
    public String editInput(@PathVariable Long id, Model model){
            model.addAttribute("type",typeService.getType(id));
            return "admin/types-input";
    }

    //提交新增分类
    @PostMapping("/types")
    public String post(@Valid Type type, BindingResult result, RedirectAttributes attributes){
        Type type1=typeService.getTypeByName(type.getName());
        if (type1 != null){              //校验重复分类
            result.rejectValue("name","nameError","不能添加重复分类");
        }
        if (result.hasErrors()){
            return "admin/types-input";
        }

        Type t=typeService.saveType(type);
        if (t==null){                  //校验添加分类名称为空
            attributes.addFlashAttribute("message","新增分类失败");
        }else {
            attributes.addFlashAttribute("message","新增分类成功");
        }
        return "redirect:/admin/types";
    }

    //修改分类
    @PostMapping("/types/{id}")
    public String editPost(@Valid Type type, BindingResult result,
                           @PathVariable Long id, RedirectAttributes attributes){
        Type type1=typeService.getTypeByName(type.getName());
        if (type1 != null){              //校验重复分类
            result.rejectValue("name","nameError","不能添加重复分类");
        }
        if (result.hasErrors()){
            return "admin/types-input";
        }

        Type t=typeService.updateType(id,type);
        if (t==null){                  //校验添加分类名称为空
            attributes.addFlashAttribute("message","修改分类失败");
        }else {
            attributes.addFlashAttribute("message","修改分类成功");
        }
        return "redirect:/admin/types";
    }

    //删除分类
    @GetMapping("/types/{id}/delete")
    public String delete(@PathVariable Long id,RedirectAttributes attributes){
        typeService.deleteType(id);
        attributes.addFlashAttribute("message","删除分类成功");
        return "redirect:/admin/types";

    }
}
